31223000 has 32 divisors (see below), whose sum is σ = 73064160. Its totient is φ = 12488800.

The previous prime is 31222991. The next prime is 31223021. The reversal of 31223000 is 32213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14612 + ... + 16611.

It is an arithmetic number, because the mean of its divisors is an integer number (2283255).

Almost surely, 2^31223000 is an apocalyptic number.

It is an amenable number.

31223000 is an abundant number, since it is smaller than the sum of its proper divisors (41841160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31223000 is a wasteful number, since it uses less digits than its factorization.

31223000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31244 (or 31230 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 31223000 is about 5587.7544684784. The cubic root of 31223000 is about 314.8895220199.

Adding to 31223000 its reverse (32213), we get a palindrome (31255213).

The spelling of 31223000 in words is "thirty-one million, two hundred twenty-three thousand".